Dayton belt-drive exhaust fans are designed for proper ventilation in industrial and commercial facilities. These units feature 6-blade galvanised steel propellers for moving large volumes of air at low static pressures. They come with variable pitch, an adjustable motor pulley that allows varied fan speeds & CFM optimise fan's performance. These exhaust fans feature totally enclosed air over (TENO) enclosures (dust-tight) using airflow from external sources to blow the air across the motor frame for cooling. They can be mounted in either vertical or horizontal positions and are available in 1039 and 1221 rpm fan speeds.